function switchLanguage(clstr, zhis) {
	var li = $("." + clstr);
	li.each(function() {
		var que = $(this);
		if (zhis.checked) {
			que.show();
		} else {
			que.hide();
		}
	});
	var lan = $(".language:checked");
	lan.prop("disabled", lan.size() == 1);

}




function syncAnswerSelected(zhis){
	var no = zhis.title;
	var boo = zhis.checked;
	var quest = $(zhis).parents(".question");
	var ops = quest.find(".option input[title='"+no+"']");
	ops.each(function(index,item){
		item.checked=boo;
		item.value = boo;
	});
	
	
}